JP5755263B2 - Battery status detection device - Google Patents

Description

  The present invention relates to a battery state detection device that detects a current of a battery mounted on a vehicle such as an automobile and notifies a battery state to an ECU (Engine Control Unit) that controls the engine.

  In recent years, electronic components that consume electric power, such as electronic control of engines, audio devices, navigation devices, and the like are increasing in vehicles such as automobiles, and the load on batteries mounted on the vehicles is increasing.

In addition, in order to cope with recent environmental problems, vehicles equipped with an idling stop function are increasing. In such a vehicle, when the state of the battery is deteriorated such as a decrease in the charging rate, there arises a problem that the engine cannot be restarted. For this reason, it is required to always monitor the state of the battery and appropriately control the engine and the like.
Therefore, for example, a battery state detection device is proposed that is interposed between a battery that connects a battery and electrical components and the battery, detects the state of the battery based on the detected current, and notifies the ECU or the like. ing.

  For example, a battery state detection sensor described in Patent Literature 1 includes a battery post terminal connected to a battery post of a battery, a shunt resistor connecting a wire harness via a stud bolt, a battery post terminal, and a shunt resistor. And a main body for detecting and notifying the state of the battery.

  By the way, in such a battery state detection device, as in the battery state detection device described in Patent Document 2, for example, a terminal member that connects the shunt resistor mounted on the case and the circuit board is used with a screw or the like. Connected to shunt resistor.

  More specifically, as shown in FIG. 11 showing a cross-sectional view of the conventional battery state detection device 100, the shunt resistor 120 is mounted inside the case 110, and the circuit board 140 is accommodated and held via the board connection terminal 130. In the battery state detection device 100, the connection terminal 150 connected to the battery is connected to the lower surface of the shunt resistor 120 to which the case 110 is attached from below using the screw 101 and the nut 102, and from the inside of the case 110. The connection terminal 150 and the shunt resistor 120 are coupled using the screw 103.

  At this time, since it is necessary to screw the screw 101, the nut 102, and the screw 103 from multiple directions by rotating the case 110, the connection terminal 150 is dropped from the case 110 when fastening with the screw 101 or the like. Alternatively, the position of the connection terminal 150 with respect to the case 110 is not stable, and the battery state detection device 100 has a problem that the assembling property of the connection terminal 150 with respect to the case 110 is poor and cannot be efficiently assembled.

JP 2011-210610 A JP 2012-215451 A

  An object of this invention is to provide the battery state detection apparatus which can improve the assembly | attachment property of the connection terminal with respect to a housing | casing in view of the above-mentioned problem.

The present invention is a battery state detection device for detecting a state of the battery interposed between a battery mounted on a vehicle and a harness energized with the battery, and is connected to one battery post in the battery. A conductive connection terminal, a harness, a conductive shunt resistor that allows connection of the connection terminal, a circuit board connected to the shunt resistor via two board connection terminals, and the shunt resistor, and thereby allow the mounting of the connecting terminals, the circuit board, and a casing you yield capacity inside the substrate connection terminal, the shunt resistor, through one of the substrate connecting terminal A first conductive portion that conducts the circuit board and the harness , and the other board connection terminal. And a second conductive part that conducts the circuit board and the connection terminal, and a resistor that is interposed between the first conductive part and the second conductive part. And the connection terminal is composed of a terminal main body connected to the battery post and a substantially long plate shape having a predetermined thickness, and a terminal coupling body attached to the housing. the said terminal connecting body, wherein a fitted portion formed insertable fitted to the housing, while extending in the longitudinal direction of the terminal connecting body from the fitted portion, the second of the shunt resistor A first connecting portion that is formed in such a size that the one board connecting terminal can be inserted into the housing , and the other board connecting terminal. Through a second opening that has a size that allows insertion Wherein with communication with the interior of the housing, and the shunt resistor can be attached to form the resistor mounting portion, in the thickness direction of the terminal connecting body, so that the connection terminal is polymerized in the shunt resistor, wherein along the longitudinal direction, and a said engaging portion formed insertable fitted fitted portion of the connecting terminal, the resistor mounting portion, the connecting the second conductive portion of the shunt resistor A connecting opening formed so as to be connectable with the connecting portion of the terminal, and when the fitted portion of the connecting terminal is inserted and fitted into the fitting portion, the connecting portion of the connecting terminal and the shunt resistor It arrange | positions in the position which the said 2nd conduction | electrical_connection part of a vessel contacts.

The state of the battery can be a charge rate, a degree of deterioration, a discharge performance, or the like.
The resistor may be copper manganese or the like.
The resistor mounting portion and the fitting portion may be formed integrally with the housing in advance, or may be configured separately and mounted on the housing.
The terminal connection body can be formed integrally with the terminal body, or formed separately and connected by welding or the like.

According to the present invention, the assembling property of the connection terminal with respect to the housing can be improved.
Specifically, by inserting and fitting the mating part of the connection terminal into the fitting part of the housing, the battery state detection device attaches the connection terminal to the housing without using screws or bolts, for example. can do. That is, the battery state detection device can easily temporarily fix the connection terminal to the housing.

  As a result, for example, when connecting the connection terminal and the shunt resistor using a bolt or nut, the battery state detection device is disconnected even if the operator rotates the casing, or the connection terminal is disconnected or connected to the shunt resistor. It is possible to prevent the terminals from being displaced. For this reason, the battery state detection device can facilitate the main assembly using screws or the like when connecting the housing, the shunt resistor, and the connection terminal.

  Furthermore, since the connecting portion of the terminal connecting body formed in a substantially long plate shape is connected to the shunt resistor and the fitted portion is inserted and fitted into the fitting portion, the connecting terminal is in the longitudinal direction. The housing can be firmly supported at a predetermined interval. For this reason, the battery state detection apparatus can aim at the improvement of the intensity | strength with respect to the external force added when attaching to a battery, for example.

Alternatively, when the harness swings due to vibration or the like, the battery state detection device can prevent the connection between the connection terminal and the shunt resistor from being easily released due to twisting or vibration applied to the shunt resistor or the housing. .
Therefore, the battery state detection device can improve the assembling property of the connection terminal to the housing.

Further, as an aspect of the present invention, the connection portion of the terminal connection body is formed thick toward the shunt resistor with respect to the thickness of the fitted portion, and in the thickness direction of the terminal connection body The surface of the fitting portion facing the fitted portion is positioned such that the distance in the thickness direction from the second conducting portion of the shunt resistor is shorter than the length in the thickness direction of the connecting portion in the terminal connector. Can be arranged.
The connecting portion extends from the fitted portion and is integrally formed with a thick wall, or a flat plate formed separately is welded to an end portion where the fitted portion is extended to form a thick wall. Can do.

According to the present invention, the battery state detection device can attach the connection terminal to the housing in a fitted state by inserting the fitted portion of the connection terminal into the fitting portion of the housing.
Specifically, since the distance in the thickness direction from the second conducting portion of the shunt resistor in the fitting portion is shorter than the length in the thickness direction of the connecting portion in the terminal connector, the battery state detection device is The fitting portion of the connection terminal is inserted with inclination.

  At this time, since the tip and the base of the connection terminal are in contact with the inside of the fitting portion, the connection terminal is inclined with respect to the fitting portion as the fitting portion is inserted into the fitting portion of the housing along the longitudinal direction. The inclination is regulated in the direction of loosening. In addition, since the mated portion is thin relative to the connecting portion of the connection terminal, the mated portion of the connection terminal is curved so as to gently protrude with respect to the shunt resistor inside the mating portion. Inserted.

  For this reason, the battery state detection device has a fitting portion in a direction in which the tip of the fitting portion of the connection terminal presses the fitting portion toward the shunt resistor and the base portion of the fitting portion is separated from the shunt resistor. And the connecting portion of the connection terminal can press the shunt resistor.

  As a result, the battery state detection device inserts the mating portion of the connection terminal into the mating portion of the housing, thereby attaching the connection terminal to the housing in a mated state without the need for a locking claw or the like. Can do. Furthermore, in the fitting part of the housing, the load required for fitting can be reliably ensured by bending the fitted part of the connection terminal, and the battery state detection device can connect the connection terminal to the housing. Temporary fixing can be performed more reliably. For this reason, the battery state detection device can more reliably prevent the connection terminal from easily falling off the casing or the mounting position of the connection terminal with respect to the casing from shifting.

  Further, since the mating state can be realized by inserting the mating portion of the connection terminal into the mating portion of the housing, the battery state detection device is provided between the mating portion and the mating portion in the thickness direction. An appropriate gap necessary for inserting the fitted portion can be provided. Thereby, the battery state detection apparatus can achieve both the improvement of the assembling property of the fitted portion with respect to the fitting portion and the temporary fixing of the connection terminal to the housing.

  In addition, since the thickness of the connecting portion is thicker than the thickness of the mated portion, the battery state detection device includes the mated portion of the connection terminal and the first conduction portion of the shunt resistor in the thickness direction. In addition, an appropriate gap can be formed between the resistor and the resistor. For this reason, it can prevent that the to-be-fitted part of a connection terminal, a 1st conduction | electrical_connection part, and a resistance body conduct | electrically_connect with the water | moisture content by dew condensation.

  Therefore, the battery state detection device can easily temporarily fix the connection terminal to the housing by inserting the mated portion of the connection terminal into the fitting portion of the housing, and the assembly of the connection terminals to the housing. Adhesiveness can be improved.

  In addition, as an aspect of the present invention, the slope of the fitting portion of the housing is inclined so that the interval between the surfaces facing the fitting body in the thickness direction increases along the side of the connecting opening in the longitudinal direction. A surface can be provided.

According to the present invention, in the battery state detection device, the inclined surface of the fitting portion can guide the insertion of the fitted portion of the connection terminal, and the insertion of the fitted portion can be facilitated.
Further, for example, the connecting portion of the connection terminal is formed thicker than the thickness of the fitted portion, and the thickness direction distance from the second conducting portion of the shunt resistor is the thickness of the connecting portion in the terminal connector. If the surface of the fitting part facing the fitting part is formed at a position shorter than the length in the direction, when the fitting part is inserted into the fitting part, the fitting part interferes with the inlet of the fitting part and is difficult to insert. Become.

  On the other hand, by providing the fitting portion with the inclined surface, the battery state detection device can be inserted while gently bending the fitted portion of the connection terminal by the inclined surface of the fitting portion. In addition, the battery state detection device can prevent the fitted portion of the connection terminal from being excessively and sharply curved as compared with the case where the inclined surface is not provided.

Thereby, the battery state detection apparatus can moderately reduce the load required for the insertion fitting when the fitting portion of the connection terminal is inserted and fitted into the fitting portion of the housing.
Therefore, the battery state detection apparatus can more easily temporarily fix the connection terminal to the housing by the inclined surface of the fitting portion, and can improve the assembling property of the connection terminal to the housing.

  Further, as an aspect of the present invention, the fitting portion of the housing is protruded in the short direction of the fitting portion of the connection terminal and abuts on the fitting portion in the short direction. A protrusion can be provided.

  According to the present invention, when the fitted portion of the connection terminal is inserted into the fitting portion of the housing, the protruding portion can press the fitted portion in the short direction. Thereby, the battery state detection apparatus can mount | wear with a connection terminal in a fitting state by inserting the to-be-fitted part of a connection terminal in the fitting part of a housing | casing. For this reason, the battery state detection device can easily temporarily fix the connection terminal to the housing.

Furthermore, the battery state detection device can prevent the fitted portion of the connection terminal from rattling in the short direction inside the fitting portion of the housing. For this reason, even if the housing in which the connection terminal is temporarily fixed is rotated, the battery state detection device can reliably prevent the position of the connection terminal with respect to the housing from shifting.
Accordingly, the battery state detection device can easily temporarily fix the connection terminal inserted into the fitting portion of the housing by the protruding portion.

As an aspect of the present invention, a side wall portion erected toward the connection terminal can be provided on an edge of the housing in the direction perpendicular to the longitudinal direction in the connection opening.
According to the present invention, when the fitted portion of the connection terminal is inserted and fitted into the fitting portion of the housing, the connection portion of the connection terminal can be inserted and guided by the side wall portion. For this reason, the battery state detection device can more smoothly fit the fitted portion of the connection terminal to the fitting portion of the housing.

Further, the side wall portion enables the battery state detection device to prevent the connecting portion of the connection terminal temporarily fixed to the housing from rattling in the short direction. Thereby, the battery state detection apparatus can hold | maintain the longitudinal direction both ends in the terminal coupling body of a connection terminal by a fitting part and a side wall part. For this reason, the battery state detection device can more reliably prevent the connection terminal from dropping from the housing.
Therefore, the battery state detection apparatus can securely temporarily fix the connection terminal to the casing, and can easily perform the main assembly with a screw or the like.

  Further, as an aspect of the present invention, the connecting portion of the connection terminal extends from the base portion of the fitted portion having a predetermined thickness in the longitudinal direction and is bent toward the distal end of the fitted portion. Can be formed.

According to the present invention, the number of parts in the connection terminal can be reduced. In addition, for example, when a connecting part is formed by overlaying a separate flat plate by welding or the like on the end part where the base of the substantially long plate-like fitting part is extended, it is connected to the fitting part. Although there is a possibility that the conductivity with the portion may be lowered, the connection terminal can ensure stable conductivity by integrally forming the connecting portion and the fitted portion.
Therefore, the battery state detection device can improve the assembling property without impairing the conductivity.

  According to the present invention, it is possible to provide a battery state detection device capable of improving the assembling property of the connection terminal to the housing.

The external appearance perspective view which shows the external appearance from the upper front view in a battery state detection apparatus. The external appearance perspective view which shows the external appearance from the downward front view in a battery state detection apparatus. The disassembled perspective view which shows the decomposition | disassembly state from the upper front view in a battery state detection apparatus. The bottom view which shows the external appearance from the downward direction in a battery state detection apparatus. AA arrow sectional drawing in FIG. BB arrow sectional drawing in FIG. Explanatory drawing explaining the housing | casing lower part equipped with the shunt resistor in upper direction. Explanatory drawing explaining the housing | casing lower part equipped with the shunt resistor in the downward view. Sectional drawing which shows the cross section from the AA arrow in FIG. 4 in the housing | casing lower part equipped with the shunt resistor. CC sectional view taken on the line in FIG. Sectional drawing which shows the cross section of the conventional battery state detection apparatus.

An embodiment of the present invention will be described below with reference to the drawings.
1 shows an external perspective view of the battery state detection device 1 from an upper front view, FIG. 2 shows an external perspective view of the battery state detection device 1 from a lower front view, and FIG. 3 shows the battery state detection device 1. 4 shows an exploded perspective view from above, FIG. 4 shows a bottom view of the battery state detection device 1, FIG. 5 shows a cross-sectional view taken along line AA in FIG. 4, and FIG. The BB arrow sectional drawing is shown.

  Further, FIG. 7 is an explanatory diagram for explaining the lower housing portion 60 with the shunt resistor 20 mounted thereon when viewed from above, and FIG. 8 is an explanatory diagram for explaining the lower housing portion 60 with the shunt resistor 20 mounted thereon when viewed downward. FIG. 9 shows a cross-sectional view taken along the line AA in the lower part 60 of the housing to which the shunt resistor 20 is mounted, and FIG. 10 shows a cross-sectional view taken along the line CC in FIG.

  In the figure, an arrow X indicates the front-rear direction (hereinafter referred to as “front-rear direction X”), and an arrow Y indicates the width direction (hereinafter referred to as “width direction Y”). Further, in the front-rear direction X, a stud bolt 24 side (lower left side in FIG. 1) of the battery state detection device 1 to be described later is defined as the front, and the opposite direction (upper right side in FIG. 1) is defined as the rear. In addition, the upper side in FIG. 1 is the upper side, and the lower side is the lower side.

  The battery state detection device 1 is interposed between a battery (not shown) mounted on a vehicle such as an automobile and a harness (not shown) that energizes the battery, and detects the state of the battery based on the detected current. And it has the function to notify ECU (illustration omitted) etc. which control an engine.

  More specifically, as shown in FIGS. 1 and 2, the battery state detection device 1 includes a connection terminal 10 connected to one battery post (not shown) in the battery, and a shunt resistor 20 that allows a harness to be connected. The detection device main body 30 is interposed between the connection terminal 10 and the shunt resistor 20 and detects the characteristics of the battery.

As shown in FIGS. 3 to 5, the connection terminal 10 is configured integrally with a terminal main body 11 connected to the battery post and a terminal coupling body 12 extending from the terminal main body 11 and connected to the detection device main body 30. doing.
The terminal body 11 is disposed in such a manner that the inner surfaces face each other in the front-rear direction X, and is formed in a semi-cylindrical shape extending in the vertical direction so that the battery post can be sandwiched.

The terminal connector 12 is formed in a substantially long plate shape having a predetermined thickness and extending in the front-rear direction X after extending in the width direction Y from the lower end of the outer peripheral surface of the terminal body 11. Yes.
More specifically, the terminal connector 12 includes a fitted portion 13 that is fitted to a fitting portion 80 of the detection device main body 30 described later, and a connecting portion 15 that is connected to a resistor rear portion 23 of the shunt resistor 20 described later. The intermediate portion 14 interposed between the fitted portion 13 and the connecting portion 15 is integrally formed by arranging the fitted portion 13, the intermediate portion 14, and the connecting portion 15 in this order from the front. .

As shown in FIG. 6, the fitted portion 13 has a length in the front-rear direction X that can be fitted into the fitting portion 80 of the detection device main body 30, and the length in the width direction Y at the base portion. The length of the front end in the width direction Y is formed in a substantially trapezoidal shape when viewed from above.
The intermediate portion 14 is formed to be wide in the width direction Y with respect to the base portion of the fitted portion 13, and is formed to extend rearward from the fitted portion 13.

  The connecting portion 15 has a width substantially the same as that of the intermediate portion 14 and extends rearward from the intermediate portion 14, and the extended rear end is bent upward and forward to form a multilayered state. A bolt hole 15a that allows insertion of a screw 2 that is connected to a resistor rear portion 23 of the shunt resistor 20 described later is formed in the approximate center of the connecting portion 15.

  Further, as shown in FIGS. 3 and 5, the shunt resistor 20 is a resistor based on a dissimilar metal bond using copper manganese as a resistor, and before and after the resistor 22 is arranged in the approximate center in the front-rear direction X. It is formed in a substantially long plate shape extending in the direction X. In addition, the shunt resistor is formed longer than the length in the front-rear direction X in the front section 64 of the casing 40 described later.

More specifically, the shunt resistor 20 includes a resistor front part 21 to which a harness is connected, a resistor 22, and a resistor rear part 23 connected to the connecting part 15 of the connection terminal 10 in this order from the front. Formed.
In the vicinity of the front end of the resistor front portion 21, a stud bolt 24 that allows harness connection is press-fitted from below to above.

The resistor rear portion 23 is formed with a screw hole 23a that allows insertion of the screw 2 connected to the connecting portion 15 of the connection terminal 10.
Further, in the vicinity of the resistor 22 in the resistor front portion 21 and the resistor rear portion 23, screw holes 21a and 23b into which screws 4 and 5 for fastening a first substrate connection terminal 32 of the detection device main body 30 described later are screwed. Is forming.

Further, the detection device main body 30, as shown in FIGS. 3 to 5, the circuit board 31, the first substrate connection terminals 32 of the two conductive, these internal yield capacity to Rutotomoni, the connection terminals 10 and The housing 40 allows the mounting of the shunt resistor 20.

  The circuit board 31 forms an electric circuit pattern (not shown) on a plate surface of a substantially plate-like insulating plate having insulating properties, and has a plurality of through holes 31a and 31b opened to be connectable to the electric circuit pattern. A CPU (not shown) and a memory (not shown) are mounted in a shape.

  The first substrate connection terminal 32 has an opening 32c that allows the screws 4 and 5 to be inserted, and a terminal bottom portion 32a that is connected to the shunt resistor 20, and stands upward from the terminal bottom portion 32a. Two legs 32b connected to the circuit pattern are integrally formed.

The casing 40 has a substantially box-like shape having an approximately L shape as viewed from above and has an insulating upper portion 50 and a lower housing portion 60 positioned in the vertical direction. ing.
The housing upper part 50 is integrally formed with a top plate 51 that is substantially L-shaped when viewed from above and an upper side surface part 52 that hangs downward along the outer periphery of the top plate 51. Further, the upper side surface portion 52 is formed with a plurality of locked portions 53 to be locked by locking claws 63 of the housing lower portion 60 described later.

  The housing lower portion 60 is formed in a substantially box shape with an upper portion opened by a bottom surface 61 that is substantially L-shaped when viewed from above and a lower side surface portion 62 that is erected upward along the outer periphery of the bottom surface 61. The lower side surface portion 62 is formed with a plurality of locking claws 63 that are locked to the locked portion 53 of the housing upper portion 50.

More specifically, the housing lower portion 60 includes a front section 64 arranged on the front side and a rear section 65 having a length in the width direction Y shorter than the length of the front section 64 in the width direction Y in the front-rear direction. It is arranged and formed in a substantially L shape when viewed from above.
A male connector portion 66 that allows connection of a female connector (not shown) connected to an ECU or the like is formed on the lower side surface portion 62 of the rear section 65 so as to protrude toward one side in the width direction Y. .

  Inside the front section 64, three second board connection terminals 67 connected to the circuit board 31 protrude upward from the bottom face 61. The second substrate connection terminal 67 is formed integrally with a connection terminal (not shown) of the male connector portion 66 and is embedded in the bottom surface 61 in advance when the casing lower portion 60 is molded.

  Further, as shown in FIG. 7, the bottom surface 61 of the front section 64 has a substantially rectangular first opening that exposes the vicinity of the screw hole 21 a of the resistor front portion 21 of the shunt resistor 20 on one end side in the width direction Y. The part 64a, the second opening 64b exposing the vicinity of the screw hole 23b of the resistor rear part 23 in the shunt resistor 20, and the third opening 64c exposing the vicinity of the screw hole 23a of the resistor rear part 23 are arranged in this order from the front. An opening is formed.

  In addition, on the lower surface of the bottom surface 61 in the front section 64, as shown in FIGS. 4, 5, and 8, a resistor mounting portion 70 for mounting the shunt resistor 20, and a lower portion of the resistor mounting portion 70. The fitting part 80 which the to-be-fitted part 13 of the connecting terminal 10 fits is formed.

  The resistor mounting portion 70 is formed so that the shunt resistor 20 can be slidably fitted from the front to the rear and from the rear end of the front section 64 to the front so as to hold the side surface and the lower surface of the shunt resistor 20. It is extended.

  The resistor mounting portion 70 holds the resistor 22 and the resistor rear portion 23 of the shunt resistor 20 with the bottom surface 61 of the front section 64, and in front of the resistor of the shunt resistor 20 in a range protruding from the housing 40. It is formed in a shape that holds the portion 21.

Further, a connection opening 71 that exposes the lower surface of the resistor rear portion 23 of the shunt resistor 20 is formed behind the resistor mounting portion 70.
One side of the connecting opening 71 in the width direction Y includes a side wall 72 formed by a step with the lower surface of the resistor rear portion 23, and the other side in the width direction Y has a side wall standing upright. 73 is provided.

  Further, when the connecting portion 15 of the connection terminal 10 comes into contact with the resistor rear portion 23 of the shunt resistor 20 exposed from the connection opening 71, the fitting portion 80 starts the insertion fitting of the connecting portion 13 of the connection terminal 10. It arrange | positions in the position of the front-back direction X to do.

  More specifically, as shown in FIGS. 8 and 9, the fitting portion 80 includes a fitting upper surface portion 81 extending from the front edge of the connection opening 71 and the plate thickness of the fitting portion 13 in the connection terminal 10. A fitting lower surface portion 82 facing the fitting upper surface portion 81 in the vertical direction with a slightly larger interval, and the rear of the fitting upper surface portion 81 and the fitting lower surface portion 82 in one direction in the width direction Y are connected in the vertical direction. The rear side surface portion 83 and the front side surface portion 84 connecting the front of the fitting upper surface portion 81 and the fitting lower surface portion 82 in the vertical direction on the other side in the width direction Y are integrally formed.

  The fitting upper surface portion 81 is formed integrally with the bottom surface (not shown) of the resistor mounting portion 70, and is an upper inclined surface 81a inclined forward and downward by a predetermined length from the front edge of the connection opening 71. And an upper flat surface 81b extending forward from the front end of the upper inclined surface 81a.

  In the upper flat surface 81 b of the fitting upper surface portion 81, the vertical length from the resistor rear portion 23 of the shunt resistor 20 exposed from the connection opening 71 is half of the vertical length of the connection portion 15 of the connection terminal 10. That is, it arrange | positions in the position smaller than the plate | board thickness of the to-be-fitted part 13. FIG.

The fitting lower surface portion 82 is formed in a shape having a lower inclined surface 82a inclined from the rear toward the front upper side and a lower flat surface 82b extending forward from the front end of the lower inclined surface 82a.
In the lower flat surface 82 b of the fitting lower surface portion 82, the vertical length from the resistor rear portion 23 of the shunt resistor 20 exposed from the connection opening 71 is shorter than the vertical length of the connection portion 15 of the connection terminal 10. Placed in position.

  As shown in FIGS. 9 and 10, at the front end of the rear side surface portion 83 and the rear end of the front side surface portion 84, a linear protrusion 85 that holds the fitted portion 13 of the connection terminal 10 in the width direction Y. , 86 project in the width direction Y and extend in the vertical direction.

Next, in the battery state detection device 1 having such a configuration, a method of assembling the circuit board 31, the connection terminal 10, and the shunt resistor 20 to the housing 40 will be described in detail.
First, the shunt resistor 20 is mounted on the resistor mounting portion 70 of the housing lower part 60. At this time, the resistor rear portion 23 of the shunt resistor 20 is inserted and fitted from the front of the resistor mounting portion 70.

  Then, the connecting portion 15 of the connection terminal 10 is slightly inclined downward with respect to the fitting portion 80 of the housing lower portion 60 and the fitted portion 13 is inserted from the rear toward the front. At this time, the fitted portion 13 is inserted along the upper inclined surface 81 a and the lower inclined surface 82 a of the fitting portion 80, and the connecting portion 15 is inserted so as to contact the resistor rear portion 23. Thereafter, the fitting portion 13 of the connection terminal 10 is fitted to the fitting portion 80 until the screw hole 23a of the resistor rear portion 23 in the shunt resistor 20 and the bolt hole 15a of the connection terminal 10 are in the same position in the front-rear direction X. insert.

  At this time, as shown in FIG. 5, the fitted portion 13 of the connection terminal 10 is inserted with a slight curve so that the base portion protrudes downward in the fitting portion 80. Further, the tip of the fitted portion 13 abuts on the upper flat surface 81 b of the fitting portion 80, and the base of the fitted portion 13 abuts on the lower inclined surface 82 a of the fitting portion 80.

  In addition, as shown in FIG. 6, the side surface of the mated portion 13 in the connection terminal 10 crushes the linear protrusion 86 of the front side surface portion 84 and the linear protrusion 85 of the rear side surface portion 83. And are pinched by the linear protrusion 85 and the linear protrusion 86.

Subsequently, after the first substrate connection terminal 32 is placed on the shunt resistor 20 via the first opening 64a and the second opening 64b of the housing lower part 60, the shunt resistor is used from above with screws 4 and 5. The first board connection terminal 32 is fastened to 20.
Furthermore, after placing the nut 3 on the shunt resistor 20 through the third opening 64c, the connection terminal 10 is fastened to the shunt resistor 20 using the screw 2 from below.

  Thereafter, the circuit board 31 is mounted in the front section 64 in the housing lower part 60 from above. At this time, the first board connection terminal 32 is connected to the through hole 31a of the circuit board 31, and the second board connection terminal 67 is connected to the through hole 31b.

  The housing upper part 50 is put on the housing lower part 60 assembled with the connection terminal 10, the shunt resistor 20, the first board connecting terminal 32, and the circuit board 31 from above to lock the housing upper part 50. The battery state detection device 1 is configured by locking the portion 53 to the locking claw portion 63 of the housing lower portion 60.

The battery state detection device 1 configured as described above can improve the assembling property of the connection terminal 10 to the housing 40.
Specifically, by inserting and fitting the fitted portion 13 of the connection terminal 10 into the fitting portion 80 of the housing 40, the battery state detection device 1 can connect the connection terminal without using, for example, a screw or a bolt. 10 can be attached to the housing 40. That is, the battery state detection device 1 can easily temporarily fix the connection terminal 10 to the housing 40.

  Thereby, for example, when connecting the connection terminal 10 and the shunt resistor 20 using bolts or nuts, the battery state detection device 1 causes the connection terminal 10 to drop off even if the operator rotates the casing 40. The position of the connection terminal 10 with respect to the shunt resistor 20 can be prevented from shifting. For this reason, the battery state detection device 1 can facilitate the main assembly using screws or the like when connecting the housing 40, the shunt resistor 20, and the connection terminal 10 respectively.

  Further, since the connecting portion 15 of the terminal connecting body 12 is connected to the shunt resistor 20 and the fitted portion 13 is inserted and fitted into the fitting portion 80, the connection terminal 10 is predetermined in the front-rear direction X. The housing 40 can be firmly supported with an interval of.

For this reason, the battery state detection apparatus 1 can aim at the improvement of the intensity | strength with respect to the external force added when attaching to a battery, for example. Alternatively, when the harness swings due to vibration or the like, the battery state detection device 1 can easily release the connection between the connection terminal 10 and the shunt resistor 20 due to torsion or vibration applied to the shunt resistor 20 or the housing 40. Can be prevented.
Therefore, the battery state detection device 1 can improve the assembling property of the connection terminal 10 to the housing 40.

  In addition, the upper plane 81b of the fitting portion 80 is disposed at a position where the vertical length from the resistor rear portion 23 of the shunt resistor 20 is smaller than the plate thickness of the fitting portion 13, and the resistance of the shunt resistor 20 is set. By disposing the lower flat surface 82b at a position where the vertical distance from the rear portion 23 is shorter than the vertical length of the connecting portion 15 in the terminal connecting body 12, the battery state detection device 1 allows the fitting portion 13 of the connecting terminal 10 to be fitted. Is inserted into the fitting portion 80 of the housing 40, so that the connection terminal 10 can be attached to the housing 40 in a fitted state.

  Specifically, since the vertical length from the resistor rear portion 23 of the shunt resistor 20 in the fitting portion 80 is shorter than the vertical length of the connecting portion 15 in the terminal connector 12, the battery state detection device 1 is The to-be-fitted portion 13 of the connection terminal 10 is inserted at an angle with respect to the fitting portion 80 of the housing 40.

  At this time, since the tip and base of the connection terminal 10 are in contact with the inside of the fitting portion 80, the connection terminal 10 is fitted so that the fitting portion 13 is inserted forward into the fitting portion 80 of the housing 40. The inclination is regulated in a direction in which the inclination with respect to the portion 80 becomes gentle. In addition, since the fitted portion 13 is thin relative to the connecting portion 15 of the connection terminal 10, the fitted portion 13 of the connection terminal 10 protrudes gently downward in the fitting portion 80. Inserted curved.

  For this reason, the battery state detection device 1 presses the fitting part 80 with the tip of the fitting part 13 of the connection terminal 10 facing upward, and the base part of the fitting part 13 faces downward. And the connecting portion 15 of the connection terminal 10 can press the shunt resistor 20.

  Thus, the battery state detection device 1 inserts the fitted portion 13 of the connection terminal 10 into the fitting portion 80 of the housing 40, so that the connection terminal 10 is attached to the housing 40 without using a locking claw or the like. It can be mounted in a fitted state. Furthermore, in the fitting part 80 of the housing 40, the fitting part 13 of the connection terminal 10 is curved, so that the load required for fitting can be ensured reliably. In contrast, the connection terminal 10 can be temporarily fixed more securely. For this reason, the battery state detection device 1 can more reliably prevent the connection terminal 10 from easily falling off the housing 40 or the mounting position of the connection terminal 10 with respect to the housing 40 from shifting.

  Furthermore, since the fitted state can be realized by inserting the fitted portion 13 of the connection terminal 10 into the fitted portion 80 of the housing 40, the battery state detection device 1 is connected to the fitted portion 13 in the vertical direction. An appropriate gap necessary for insertion of the fitted portion 13 can be provided between the fitting portion 80. Thereby, the battery state detection apparatus 1 can achieve both the improvement of the assembling property of the fitted portion 13 with respect to the fitting portion 80 and the temporary fixing of the connection terminal 10 with respect to the housing 40.

  In addition, since the connecting portion 15 is thicker than the thickness of the fitted portion 13, the battery state detection device 1 can detect the fitted portion 13 of the connection terminal 10 and the resistance of the shunt resistor 20 in the vertical direction. An appropriate gap can be formed between the body 22 and the resistor front portion 21. For this reason, it can prevent that the to-be-fitted part 13 of the connection terminal 10, and the resistor front part 21 and the resistor 22 conduct | electrically_connect with the water | moisture content by dew condensation.

  Therefore, the battery state detection device 1 can easily temporarily fix the connection terminal 10 to the housing 40 by inserting the fitted portion 13 of the connection terminal 10 into the fitting portion 80 of the housing 40. The assembling property of the connection terminal 10 to the housing 40 can be improved.

  Further, by providing the fitting portion 80 of the housing 40 with the upper inclined surface 81a and the lower inclined surface 82a, the battery state detection device 1 has the upper inclined surface 81a and the lower inclined surface 82a covered by the connection terminal 10. The insertion of the fitting part 13 can be guided, and the insertion of the fitted part 13 can be made easier.

  Further, for example, when the upper inclined surface 81a and the lower inclined surface 82a are not formed in the fitting portion 80, when the fitted portion 13 of the connection terminal 10 is inserted and fitted into the fitting portion 80 of the housing, The to-be-fitted part 13 interferes with the inlet of the fitting part 80, and it becomes difficult to insert.

  On the other hand, by providing the fitting portion 80 with the upper inclined surface 81a and the lower inclined surface 82a, the battery state detection device 1 can fit the connection terminal 10 with the upper inclined surface 81a and the lower inclined surface 82a. The joint portion 13 can be inserted while being gently curved. In addition, the battery state detection device 1 prevents the fitted portion 13 of the connection terminal 10 from being excessively and sharply curved when the upper inclined surface 81a and the lower inclined surface 82a are not provided. it can.

Thereby, the battery state detection apparatus 1 can moderately reduce the load required for insertion fitting when the fitted portion 13 of the connection terminal 10 is inserted and fitted into the fitting portion 80 of the housing 40.
Therefore, the battery state detection device 1 can more easily temporarily fix the connection terminal 10 to the housing 40 by the upper inclined surface 81a and the lower inclined surface 82a. Can be improved.

  Further, since the linear protrusions 85 and 86 are provided in the fitting portion 80 of the housing 40, when the fitting portion 13 of the connection terminal 10 is inserted into the fitting portion 80 of the housing 40, the linear protrusion The portions 85 and 86 can press the fitted portion 13 in the width direction Y. As a result, the battery state detection device 1 can attach the connection terminal 10 to the housing 40 in a fitted state by inserting the fitted portion 13 of the connection terminal 10 into the fitting portion 80 of the housing 40. it can. For this reason, the battery state detection device 1 can temporarily fix the connection terminal 10 to the housing 40 easily.

Furthermore, the battery state detection device 1 can suppress the backlash of the fitted portion 13 of the connection terminal 10 in the width direction Y inside the fitting portion 80 in the housing 40. For this reason, even if the housing 40 with the connection terminal 10 temporarily fixed is rotated, the battery state detection device 1 can reliably prevent the position of the connection terminal 10 from being displaced with respect to the housing 40.
Therefore, the battery state detection device 1 can easily temporarily fix the connection terminal 10 inserted into the fitting portion 80 of the housing 40 by the linear protrusions 85 and 86.

  Further, since the connecting opening 71 of the housing 40 is provided with the side walls 72 and 73, when the fitting portion 13 of the connection terminal 10 is inserted and fitted into the fitting portion 80 of the housing 40, the connection terminal Ten connecting portions 15 can be inserted and guided by the side wall portions 72 and 73. For this reason, the battery state detection device 1 can more smoothly fit the fitted portion 13 of the connection terminal 10 to the fitting portion 80 of the housing 40.

Furthermore, the side wall portions 72 and 73 allow the battery state detection device 1 to prevent the connecting portion 15 of the connection terminal 10 temporarily fixed to the housing 40 from rattling in the width direction Y. Thereby, the battery state detection apparatus 1 can hold | maintain the front-back direction X both ends in the terminal coupling body 12 of the connection terminal 10 by the fitting part 80 and the side wall parts 72 and 73. FIG. For this reason, the battery state detection device 1 can more reliably prevent the connection terminal 10 from dropping from the housing 40.
Therefore, the battery state detection device 1 can securely temporarily fix the connection terminal 10 to the housing 40, and can easily perform this assembly with screws or the like.

  Moreover, the number of parts in the connection terminal 10 can be reduced by forming the connecting portion 15 of the connection terminal 10 by bending the rear end extending backward from the base portion of the fitted portion 13 forward. Further, for example, when the connecting portion 15 is formed by overlaying a separate flat plate by welding or the like on the end portion where the base portion of the substantially long plate-like fitting portion 13 is extended, There is a possibility that the electrical conductivity between 13 and the connecting portion 15 is lowered.

On the other hand, since the battery state detection device 1 integrally forms the connecting portion 15 and the fitted portion 13, the connection terminal 10 can ensure stable conductivity.
Therefore, the battery state detection device 1 can improve the assembling property without impairing the conductivity.

In the above-described embodiment, copper manganese is used as the resistor 22. However, the present invention is not limited to this, and any other conductive member may be used as long as it is a conductive member that can be used as the resistor 22.
Moreover, while extending from the intermediate part 14 and bend | folding ahead and forming the connection part 15, it is not limited to this, The board thickness of a connection part with respect to the board thickness of the to-be-fitted part 13 and the intermediate part 14 If it is a thick structure, a separate connecting part may be welded to the rear end of the substantially long plate-like material having the fitted part 13 at the tip, or the thickness of the fitted part 13 is Then, the connecting portion may be formed by molding so that the thickness of the connecting portion is increased.

Moreover, although the terminal body 11 and the terminal coupling body 12 were formed integrally, and the connection terminal 10 was comprised, it is not limited to this, While forming the terminal body 11 and the terminal coupling body 12 separately, The terminal connector 12 may be fastened or welded to form the connection terminal 10.
In addition, the resistor mounting portion 70 is formed integrally with the housing lower portion 60. However, the present invention is not limited thereto, and the resistor mounting portion 70 is configured separately from the housing lower portion 60, and is locked. Or it is good also as a structure attached by fitting.

Moreover, although the shunt resistor 20 and the connection terminal 10 are fastened with the screw 2 and the nut 3, the present invention is not limited thereto, and the connection terminal 10 and the shunt resistor 20 temporarily fixed to the housing 40 may be welded.
In addition, the first board connection terminal 32 is fastened to the shunt resistor 20 with the screws 4 and 5. However, the present invention is not limited to this, and the first board connection terminal 32 may be welded to the shunt resistor 20.

  Further, a sealing member that abuts the upper end of the lower side surface portion 62 in the housing lower portion 60 in the vertical direction may be attached to the housing upper portion 50. Thereby, it is possible to prevent moisture from entering the inside of the housing 40 and prevent the circuit board 31 from being rusted.

  Alternatively, urethane resin may be filled until the circuit board 31 is immersed in the front section 64 in the lower part 60 of the housing in which the circuit board 31, the first board connection terminal, and the shunt resistor 20 are mounted. At this time, a notch or the like may be provided in the circuit board 31 so that the urethane resin can be filled smoothly. Thereby, even if dew condensation or the like occurs inside the housing 40 due to a change in the outside air temperature or the like, it is possible to prevent moisture from adhering to the circuit board 31 and causing rust or the like. For this reason, the battery state detection apparatus 1 can improve the assembly property and ensure more stable conductivity.

In correspondence between the configuration of the present invention and the above-described embodiment,
The board connection terminal of the present invention corresponds to the first board connection terminal 32 of the embodiment,
Similarly,
The first conduction part corresponds to the resistor front part 21;
The second conduction part corresponds to the resistor rear part 23,
The longitudinal direction corresponds to the front-rear direction X,
The thickness direction corresponds to the vertical direction,
The surface of the fitting part facing the fitted part corresponds to the upper plane 81b and the lower plane 82b,
The inclined surfaces correspond to the upper inclined surface 81a and the lower inclined surface 82a,
The short direction corresponds to the width direction Y,
The protrusions correspond to the line protrusions 85 and the line protrusions 86,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Battery state detection apparatus 10 ... Connection terminal 11 ... Terminal main body 12 ... Terminal coupling body 13 ... Fit part 15 ... Connection part 20 ... Shunt resistor 21 ... Resistor front part 22 ... Resistor 23 ... Resistor rear part 31 ... Circuit board 32 ... First board connection terminal 40 ... Housing 70 ... Resistor mounting part 71 ... Connection opening 72 ... Side wall part 73 ... Side wall part 80 ... Fitting part 81a ... Upper inclined surface 81b ... Upper flat surface 82a ... Lower part Inclined surface 82b ... Lower flat surface 85 ... Linear protrusion 86 ... Linear protrusion X ... Front-rear direction Y ... Width direction

Claims (6)

A battery state detection device for detecting a state of the battery interposed between a battery mounted on a vehicle and a harness energized with the battery,
A conductive connection terminal connected to one battery post in the battery;
A conductive shunt resistor that allows connection of the harness and the connection terminal;
A circuit board connected to the shunt resistor via two board connection terminals;
The shunt resistor, and thereby allow the mounting of the connecting terminals, comprising the circuit board, and a housing you yield capacity inside the substrate connection terminals,
The shunt resistor,
A first conductive portion that is conductively connected to the circuit board via one of the board connection terminals , and that conducts the circuit board and the harness;
A second conductive portion that is conductively connected to the circuit board via the other board connection terminal, and that connects the circuit board and the connection terminal;
The first conductive part and the resistor interposed between the second conductive part are integrally configured,
The connection terminal,
A terminal body connected to the battery post;
It is formed in a substantially long plate shape having a predetermined thickness, and is composed of a terminal connector attached to the housing,
The terminal connector is
A mated portion formed so as to be insertable and matable with the housing;
The addition to extending in the longitudinal direction of the terminal connection member from the engaged portion, constituted by said connecting portion formed to be connected to the second conductive portion of the shunt resistor,
In the case,
The first opening having a size that allows insertion of the one board connection terminal and the second opening that has a size that allows the other board connection terminal to be inserted through the first opening. A resistor mounting portion that communicates with the inside and is configured to be able to mount the shunt resistor;
In the thickness direction of the terminal connecting body, so that the connection terminal is polymerized in the shunt resistor, the longitudinal direction along the connecting the mating portion formed insertable fitted fitted portion of the terminal And
In the resistor mounting part,
A connection opening formed so that the second conduction portion of the shunt resistor can be connected to the connection portion of the connection terminal;
The fitting portion,
The battery state detection device arranged at a position where the connecting portion of the connection terminal and the second conduction portion of the shunt resistor are in contact with each other when the fitted portion of the connection terminal is inserted and fitted. The connection part of the terminal connection body,
Formed thick toward the shunt resistor with respect to the thickness of the fitted portion,
In the thickness direction of the terminal connector, the surface of the fitting portion facing the fitting portion,
The battery state detection device according to claim 1, wherein a distance in a thickness direction of the shunt resistor from the second conduction portion is arranged at a position shorter than a length in a thickness direction of the connection portion in the terminal connection body. In the fitting part of the housing,
3. The battery state detection device according to claim 1, further comprising an inclined surface that is inclined so that an interval between surfaces facing each other in the thickness direction of the terminal connector increases along the connection opening side in the longitudinal direction. In the fitting part of the housing,
4. The device according to claim 1, further comprising a protruding portion that protrudes in a short direction of the fitting portion of the connection terminal and contacts the fitting portion in the short direction. 5. Battery state detection device. On the edge in the direction orthogonal to the longitudinal direction in the connection opening of the housing,
The battery state detection device according to any one of claims 1 to 4, further comprising a side wall portion erected toward the connection terminal. The connecting portion of the connection terminal is
6. The battery according to claim 1, wherein the battery extends in the longitudinal direction from a base portion of the fitted portion having a predetermined thickness and is bent toward the tip of the fitted portion. Condition detection device.

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